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C1861W-SRST-C-B/K9
1861,WLAN,8-usrSRST/CME,CUE,4FXS,2BRI,8xPOE,SP Svcs,HWICslot
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C1861W-SRST-C-B/K9 is designed on a fixed modular architecture that integrates robust power options via an AC power supply with redundancy, alongside dedicated WAN and LAN interfaces to support secure connectivity. It delivers integrated services including voice, video, and WAN optimization while offering VPN functionality such as IPSec for reliable remote access.
C1861W-SRST-C-B/K9 also features modular capabilities with an expansion slot for future network enhancements, ensuring high throughput and dependable performance. Its design emphasizes redundancy and built‐in security features, making it well suited for business and small office deployments requiring secure, scalable connectivity.
C1861W-SRST-C-B/K9 price is $2,412.00, a 51.7% saving from the Cisco list price of $4,995.00. C1861W-SRST-C-B/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C1861W-SRST-C-B/K9 for additional pricing. Browse the full Router Isr 1800 series or explore all Cisco products.
In a small-to-midsize branch deployment, the Cisco C1861W-SRST-C-B/K9 delivers integrated 802.11n WLAN, eight PoE ports and four FXS voice interfaces in one platform. This use case unifies secure wireless access, IP telephony and PoE-powered security cameras over a single router, reducing capital and operational expenses. Outcome: simplified network roll-out, centralized power management for IP endpoints and hardened Wi-Fi security for branch employees and guests.
Enterprises with distributed sites leverage the C1861W’s SRST/CME feature to maintain local call processing during MPLS or Internet outages. Supporting up to eight SRST/CME users and two BRI trunks, the router ensures uninterrupted voice communications when the primary call manager is unreachable. Outcome: guaranteed business-continuity, zero toll fraud during outages and improved end-user productivity through continuous dial-tone availability.
Service providers deploy the C1861W-SRST-C-B/K9 with SP Services image and an available HWIC slot to offer tailored voice, data and security solutions for SMB customers. With modular support for VLANs, MPLS VPN, two BRI circuits and four FXS ports, providers can integrate legacy PBX lines while delivering secure, multi-tenant Ethernet and Wi-Fi services. Outcome: rapid service provisioning, higher ARPU through value-added voice/data bundles and flexible future upgrades via HWIC modules.
To get the detailed certification, please go to the Compliance Center.
| C1861W-SRST-C-B/K9 |  CISCO1812W-AG-C/K9 |  C1861W-SRST-B/K9 |  C1841-3G-G |  CISCO1801/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | N/A | N/A | N/A | N/A | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention |
| Compliance Standards | FCC / CE | FCC, CE | FCC, CE, UL | IEEE 802.3, IEEE 802.3u | FCC / CE |
| Connectivity Type | Wired / Wireless | Wired / Wireless | Wired / Wireless | Wired | Wired |
| Depth | N/A | 11.0 inches | N/A | N/A | 14 in |
| Device Type | Router | Router | Router | Router | Router |
| EMC | FCC | N/A | N/A | N/A | N/A |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100 | 10/100 |
| Expansion Slots | EHWIC | EHWIC | NIM | EHWIC | NIM |
| Features | VPN / VoIP / IPv6 Compatible / Firewall | VPN / IPv6 Compatible / Firewall / VoIP | VPN, Firewall, Integrated Services, IPv6 Compatible | VPN / IPv6 Compatible / Firewall | VPN / Voice / Firewall / IPv6 Compatible |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 128 MB | 256 MB | 256 MB | 128 MB |
| Form Factor | Desktop | Desktop | Desktop | Rack-mount | Rack-mount |
| Height | N/A | 1.73 inches | N/A | N/A | 1.75 in |
| High Availability Support | Supported | Not Supported | Supported | Not Supported | Not Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice | Voice, Video | Voice | Voice / Video |
| Interface Ports | RJ-45 / Combo Ports | RJ-45 | RJ-45 | RJ-45 | RJ-45 |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | N/A | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 512 MB | 256 MB | 128 MB | 256 MB |
| Modular Slots Available | 1 Slot | 1 Slot | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | IPv4 / IPv6 / TCP/IP | IPv4, IPv6 | IPv4, IPv6 | IPv4, IPv6, MPLS | IPv4 / IPv6 |
| Power | 50W | 35W | 40W | 73 W | 48 W |
| Power Source | AC Power Supply with Redundant Option | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Cisco 1861W Integrated Services Router with SRST | CISCO1812W-AG-C/K9 | Cisco 1861 Wireless Services Router | Cisco 1841-3G-G | Cisco 1801 Integrated Services Router |
| Product Type | Enterprise Router | Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | Telnet / SSH / SNMP / HTTP/HTTPS | Telnet/SSH/SNMP | SSH, Telnet, SNMP | Telnet, SSH, SNMP | CLI / SSH / Telnet / SNMP |
| Routing Protocols | OSPF / EIGRP / RIP / BGP / Static Routing | OSPF / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | UL / CE | N/A | N/A | N/A | N/A |
| Speed/Capacity | Fast Ethernet (100 Mbps) | N/A | Gigabit | N/A | Gigabit |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 0.075 Gbps | 0.025 Gbps | 0.085 Gbps | 0.045 Gbps | 0.075 |
| Use Case | Business / Small Business | Business | Business / Small Business | Small Business | Enterprise |
| VPN Support | IPSec VPN | IPSec / SSL VPN | IPSec / SSL VPN / DMVPN / GRE | IPSec | IPSec / SSL VPN |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | WAN | Dual WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | N/A | 9.1 lbs | N/A | N/A | 12 lbs |
| Wi-Fi Standard | 802.11n | WiFi 4 | WiFi 4 | N/A | N/A |
| Width | N/A | 17.0 inches | N/A | N/A | 17 in |
| Wireless Support | Yes | Yes | Yes | No | No |
Cisco 1861W-SRST-B is excellent for branch offices. SRST and POE support ensures seamless voice and data continuity.
Reliable all-in-one router. Handles voice, data, and POE devices efficiently with minimal setup.
Strong SRST backup ensures uninterrupted calls. Ideal for small offices needing unified communications.
Stable performance under daily load. Cisco quality is evident in branch office deployments.
Easy to configure and manage. Ensures consistent voice and data operations.
The Cisco C1861W-SRST-C-B/K9 is an Integrated Services Router (ISR 1861) with embedded WLAN, 8-user SRST/CME, Cisco Unity Express, 4 FXS, 2 BRI, 8x PoE, service provider services and an HWIC slot for modular expansion.
The Cisco 1861 router provides eight 10/100 PoE ports, each delivering up to 15.4 W to power IP phones, access points and other PoE devices.
Yes. The C1861W-SRST-C-B/K9 features an integrated 802.11a/b/g/n access point to deliver secure Wi-Fi connectivity out of the box.
This router supports Cisco Unified Survivable Remote Site Telephony (SRST) for up to 8 users and Cisco Unified Communications Manager Express (CME) for local call processing during WAN outages.
Yes. The C1861W-SRST-C-B/K9 includes Cisco Unity Express (CUE) for integrated voicemail, auto-attendant and unified messaging services.
The router provides four FXS ports, two BRI ports and a single HWIC slot for additional serial, T1/E1 or DSL WAN modules.
The Cisco 1861 ISR includes 4 FXS ports for analog endpoints and 2 BRI ports for ISDN connectivity, enabling versatile voice and data links.
Yes. It features one High-Speed WAN Interface Card (HWIC) slot and supports Cisco Network Interface Modules (NIMs) for future connectivity upgrades.
The router supports MPLS, PPPoE, Metro Ethernet, IPv4/IPv6 routing and Quality of Service (QoS) for managed service provider deployments.
The C1861W-SRST-C-B/K9 delivers up to 50 Mbps of aggregated data throughput, suitable for small to medium branch offices.
Yes. It offers integrated IPsec VPN, GRE tunneling and SSL VPN for secure site-to-site and remote access connectivity.
The ISR 1861 measures 3.5″×13.5″×11.8″, weighs 8.4 lbs, and operates from 32°F to 104°F with 10–90% non-condensing humidity.
Under full PoE load, the C1861W-SRST-C-B/K9 consumes approximately 120 W; typical idle power draw is 45 W.
Licensing is delivered via Cisco’s Right-to-Use (RTU) model with Smart Licensing for universal device activation of advanced features.
The Cisco 1861 is ideal for small to medium branch offices, retail locations, and remote sites requiring integrated security, voice and WLAN.
The C1861W-SRST-C-B/K9 includes a limited lifetime hardware warranty and offers optional Cisco Smart Net Total Care with 24/7 technical support.